TOUCH PEN

• US 20120162150A1
• Filed: 12/22/2011
• Published: 06/28/2012
• Est. Priority Date: 12/27/2010
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Original Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Inventors: JIANG, KAI-LI, FAN, SHOU-SHAN
• Application Number:
  US13/335,899
• Publication Number:
  US 20120162150A1
• Time in Patent Office: Days
• US Class Current: 345/179
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0442 using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser

Abstract

A touch pen includes a body and a head fixed on one end of the body and electrically connected with the body. The head includes a carbon nanotube composite material. The carbon nanotube composite material includes a carbon nanotube structure and a conductive material layer coated on the carbon nanotube structure.

Claims

1. A touch pen comprising:

a body; and

a head fixed on one end of the body and electrically connected the body, wherein the head comprises a carbon nanotube composite material, the carbon nanotube composite material comprises a carbon nanotube structure and a conductive material layer coated on the carbon nanotube structure.

2. The touch pen as claimed in claim 1, wherein the carbon nanotube structure comprises a plurality of carbon nanotubes joined by van der Walls attractive forces, and the conductive material layer is coated on an outer surface of the plurality of carbon nanotubes.

3. The touch pen as claimed in claim 2, wherein a plurality of micropores is defined between adjacent carbon nanotubes of the plurality of carbon nanotubes.

4. The touch pen as claimed in claim 3, wherein a diameter of the plurality of micropores is less than or equal to 5 micrometers.

5. The touch pen as claimed in claim 4, wherein the diameter of the plurality of micropores is in a range from about 50 nanometers to about 500 nanometers.

6. The touch pen as claimed in claim 1, wherein the conductive material layer comprises an electrically conductive polymer layer made of a material selected from the group consisting of polyaniline, polypyrrole, polythiophene, polyacetylene, polyparaphenylene, poly phenylene vinylene, and any combination thereof.

7. The touch pen as claimed in claim 6, wherein a thickness of the electrically conductive polymer layer is in a range from about 30 nanometers to about 150 nanometers.

8. The touch pen as claimed in claim 6, wherein a weight percentage of the material in the carbon nanotube composite material is in a range from about 5% to about 80%.

9. The touch pen as claimed in claim 6, wherein the weight percentage of the material in the carbon nanotube composite material is in a range from about 5% to about 20%.

10. The touch pen as claimed in claim 1, wherein the conductive material layer is a metal layer having a thickness in a range from about 1 nanometer to about 20 nanometers.

11. A touch pen comprising:

a body; and

a head fixed on one end of the body and electrically connected the body, wherein the head comprises a carbon nanotube composite layer and a supporter having an outer surface, the carbon nanotube composite layer is coated on the outer surface and electrically connected with the body, the carbon nanotube composite layer comprises a carbon nanotube structure and a conductive material layer coated on the carbon nanotube structure.

12. The touch pen as claimed in claim 11, wherein the carbon nanotube structure comprises a plurality of carbon nanotubes joined by van der Walls attractive forces, the conductive material layer is coated on each of the plurality of carbon nanotubes.

13. The touch pen as claimed in claim 12, wherein a plurality of micropores is defined between adjacent carbon nanotubes of the plurality of carbon nanotubes.

14. The touch pen as claimed in claim 13, wherein a diameter of the plurality of micropores is less than or equal to 5 micrometers.

15. The touch pen as claimed in claim 14, wherein the diameter of the plurality of micropores is in a range from about 50 nanometers to about 500 nanometers.

16. The touch pen as claimed in claim 11, wherein the conductive material layer comprises an electrically conductive polymer layer made of a material selected from the group consisting of polyaniline, polypyrrole, polythiophene, polyacetylene, polyparaphenylene, poly phenylene vinylene, and any combination thereof.

17. The touch pen as claimed in claim 16, wherein a thickness of the electrically conductive polymer layer is in a range from about 30 nanometers to about 150 nanometers.

18. The touch pen as claimed in claim 16, wherein a weight percentage of the material in the carbon nanotube composite layer is in a range from about 5% to about 80%.

19. The touch pen as claimed in claim 11, wherein the carbon nanotube composite layer is a ribbon-shaped layer helically wrapping around the supporter.